Abstract:

To solve the radio interference during civil aviation ground-air communication,a design and implementation scheme of bi-channel constant modulus adaptive anti-interference receiver is presented based on FPGA and DSP platform. The signal-processing platform of receiver achieves adaptive interference cancellation in FPGA.DSP is used to determine whether there exists interference in constant modulus algorithm,and to determine the properties of output signals in case of false capture. Coupled with RF front-end signal receiving circuit,the receiver is able to receive signals,suppress interference and demodulate ground-air communication signals. Test results show that the bi-channel constant modulus anti-interference receiver can suppress constant modulus interference in self-adaptive way.

Key words: bi-channel constant modulus algorithm, interference suppression, FPGA, DSP